公开(公告)号：US20130114302A1

公开(公告)日：2013-05-09

申请号：US13668797

申请日：2012-11-05

Applicant: ABB Research Ltd

Inventor： Gerardo ESCOBAR ,  Sami PETTERSSON ,  Leonardo-Augusto SERPA ,  Ngai-Man HO ,  Antonio COCCIA ,  Alexandre OUDALOV ,  Adrian TIMBUS

IPC: G01R31/40 ,  H02M7/42

CPC classification number: H02J3/38 ,  H02J2003/388

Abstract: An exemplary method and apparatus for detecting islanding conditions of a distributed grid are disclosed, wherein transfer of power through a power electrical unit is controlled on the basis of a control reference. The apparatus includes a first stage and a second stage performing a respective portion of the method. The first stage injects a reactive component to the control reference, and, for at least one electrical quantity of the grid, determines a change in the quantity induced by the injected component, and determines, on the basis of the change in the electrical quantity, whether to move to the second stage of the method. The second stage, for at least one electrical quantity of the grid, determines a value of the electrical quantity, forms a positive feedback term using at the determined value adding a positive feedback term to the control reference, determines a change in an electrical quantity induced by the feedback term, and determines islanding condition on the basis of the change in the quantity induced by the feedback term.

Abstract translation: 公开了一种用于检测分布式电网的孤岛状况的示例性方法和装置，其中基于控制参考来控制通过电力单元的电力传输。 该装置包括执行该方法的相应部分的第一阶段和第二阶段。 第一阶段向控制基准注入无功分量，并且对于电网的至少一个电量来确定由所注入的分量引起的量的变化，并且基于电量的变化， 是否移动到第二阶段的方法。 第二阶段，对于电网的至少一个电量，确定电量的值，以确定的值形成正反馈项，将正反馈项添加到控制参考，确定引起的电量的变化 根据反馈项，根据反馈项引起的数量变化确定孤岛状态。

公开(公告)号：US20160190790A1

公开(公告)日：2016-06-30

申请号：US14910300

申请日：2014-04-30

Applicant: ABB RESEARCH LTD

Inventor： Alexandre OUDALOV ,  Antonio FIDIGATTI ,  Dmitry ISHCHENKO ,  Enrico RAGAINI ,  James STOUPIS ,  Luca MILANI

IPC: H02H3/00 ,  H02H3/08 ,  H02H7/28

CPC classification number: H02H3/006 ,  H02H3/08 ,  H02H7/28

Abstract: Method of protecting a distribution network with a line interconnecting busbars, each busbar being connectable, by means of switching devices adjacent to the busbar, to the line and to loads and/or generators. The method divides the distribution network in multiple protection areas, each comprises a busbar, a protection device and an area controller. Upon a change in connect status of a distribution feeder line, load or generator connectable to one of the busbar, the logic controller in this protection area re-calculates the short circuit level of the areas. Based on the recalculated short circuit levels, the protection settings of the areas may be adapted. The embodiment also provides a system and computer program product adapted to perform the method.

Abstract translation: 通过线路互连母线保护配电网络的方法，每个母线可通过与母线相邻的开关装置连接到线路以及负载和/或发电机。 该方法将分布网络划分为多个保护区域，每个包括母线，保护装置和区域控制器。 在分配馈线，连接到母线之一的负载或发生器的连接状态发生变化时，该保护区域中的逻辑控制器重新计算区域的短路电平。 基于重新计算的短路电平，可以调整区域的保护设置。 该实施例还提供了适于执行该方法的系统和计算机程序产品。